Respirator locking means



Allg. 14, 1945. W Z WH|PPLE 2,382,592

RESPIRATOR LOCKING MEANS Filed D80. 22, 1943 IN VEN TOR.

Patented Aug. 14, 1945 Willis Z. Whipple, Chicago, 111 assigner to Chicago Eye Shield Company, Chiuso. lli., a oorporation of Illinois Application December 22,1948, Serial No. 515,321

4 clams. im. ies-1m The present invention relates to respirators A and. more particularly. to an industrial respirator having a novel locking means adapted to hold readily removable iilter boxes to the face piece of such a respirator in a xed and immovable position during use oi'l the respirator.

ofll'lgandlookinginthedirectionofthe Referring more particularly to the drawing, there is shown a falce piece i. with filter boxes I I mounted thereon. The type of industxial respirator herein used for illustrative purposes is that A principal object of the invention is the provision oi' a respirator comprising a face piece having gripping means thereon and a removable iter b ox having receiving means on one of its walls connected to the gripping means. and a novel lociring means cooperatively associated with the gripping and receiving means to hold the lter Y box in xed and immovable position on the face piece of the respirator during use.

More specincally, it is an object of the inven- 1 immovable position by means of a novel type of locinng device associatedxerewith. after the.

tion to provide an industrial respirator having 1 a face piece with an air inlet and gripping means around the inlet. and a removable lter box with spaced apart resilient walls having reeeivirm` means on one of the walls connected to the gripping means around the inlet to draw the parts.

firmly together, the gripping means having a link extending therefrom which is connected to a projection on a 'wall of the iilter box, and a novel locking member, secured to a head strap, mounted on the projection to hold the lter box in fixed immovable position to the face piece'when the head strap is secured in position for using the respirator.

Other objects of the invention will in part be obvious and will in part appear hereinafter.

The invention accordingly comprises an article of manufacture possessing the features, properties, and the relation of elements which will be exemplified in the article hereinafter described andthe scope of the application of which will indicated in the claims.

For a fuller understanding of the natureand objectsvof the invention reference should be had to the following detailed description taken in connection with the accompanying drawing. in which; f

1 is a. rear elevational view oi a respirator embodying the invention;

locked into nxed and immovable position; Fig. 3 is a view similar to Fig. 2 illustrating.

a'fragmentary portion taken along the line 56 descriied in detail in Patent No. 2,295,119 of which I am a co-inventor. 'Ihere are certain details of that patent not illustrated herein but they do not particularly deal with the presently claimed invention which, briefly, is concerned largely with locking face pieces to filter bbxes in xed and filter boxes have been mounted in position.

The respirator has a plurality of iilter boxes but since they are substantially identical, and sinceoneotsuchboxesalonecmxldbeusedin practicing the present invention, it is'deemed suiilcient to describe only one oi' them.

V'lheiilterboxilissecuredtothefacepieoe` Il by any suitable type of gripping means, as'a bayonet joint, or other conventional snapon arrangement whereby the wall section of the tllterbox whichisadiacentthe face pieceisrmly andsecurelydrawnorpressedtothefacepiece topreventleairage..

'Iheparticulargrimingmeansusedhereinis ."indidgeneranyatnanaonsistsorasrom- 'met or flanged member il attached to the face piece Il. Attached inside thewall oiaiiiterbon is a' receiving means il or lugs Il for` receiving gripping elements I6 .which are adaptedtocooperatesecurelytoclampthewalloi'the illterboxagainsttheange llaroimdanairinlet indicated at i1.

On the inside of the iilter pad, which' -prefervafblyeonslsts ofspad apart resilientwallsaanVv extension. ilisconnectedtothereceivingmeans Il and this terminates in a'stndI-'wliich pro- Yjects through-the wall o1 the nlter pad. This stud, where it penetrates thepardds sealed against leakagebyawasher Il. Thestudterminatesin alieadZIandhasanannulargz-ooveflbelowthe if 45 head 1ilg.2isaplauviewol'aillterboz:abouttobev Ettendlng from the gripping means orange isalinkorarmvll whiohterminatesinaslot- .ted enlargement or hook Il. In assembling the nlteryboxjhe grippingmeans attached to the face piece Il is inserted within the receiving means il and given a slight turn to preliminarllylockthelterboxtothe facepieceatthis point, the arrangement of the parts of the grippingmeanssndthereceivingmeansbeingsuch thattilenlterboxwiilbesecuredinitsmost convenient position for use. During this securing operation the extension arm 23 terminating in the hook 24 becomes secured in position around the stud 2l. the stud coming to rest against a shoulder 25 of a slot 2B in the hook 24.

Also mounted upon the stud 2i is a T-slotted member 21. One slot of the T has secured therein a head or neck strap 28. The other slot of the T rides in the annular groove 22 oi the stud 2| and the entire T-slotted member overlies the hook 2l on the extension 23. Projecting from one leg of the T-slotted member is a. U- shaped hook 28 which constitutes an important portion of the locking means.

As the iilter box is swung into iitted position so that the stud 2| enters the slot 2B of the hook, a portion ll of the hook 24 enters Ithe U-shaped hook 29. The filter pad is now located in its intended position and when the head strap is swung into position, the T-slotted member I8 pivots around the stud 21 with the U-shaped hooked member 2S swinging around the portion 3U of the edge of the hook member 2l, locking the connected parts securely together and holding the lter box in xed and immovable position during the time the respirator is in use (Fig. 3).

It is very desirable that the lter boxes be quickly removable so that they can be cleaned and sterilized from time to time during the period oi' a working day if necessary. This is readily accomplished when the head or neck strap is removed by the wearer, because in doing so, the locking members automatically disengage themselves and the lter box can readily be removed from its seated position against the facel piece.

lt will thus be seen that the objects hereinbefore set forth can readily and efficiently be attained and since certain changes may be made in the above article and diii'erent embodiments of the invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended to cover all of the generic and specinc features of the invention herein described, and all statements of the scope of the invention which. as a matter or language. might be said to fall therebetween.

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In an industrial respirator. the combination comprising a face piece with gripping means thereon, a removable fllter box with spaced apart walls having receiving means on one of said walls connected to said gripping means, said gripping means including a link removably connected to a projection on a wall of said box, and a locking member securing said link to said projection and holding said box in iixed immovable position on said face during use of said respirator.

2. In an industrial respirator, the combination comprising a face piece having gripping means thereon, a. removable iilter box having receiving means on one of said walls connected to said gripping means. said gripping means including a link removably connected to a projection on a wallof said box, said projection being connected with said receiving means. and a locking member securing said link to said projection and holding said box in xed immovable position on said face piece during use or said respirator.

3. In an industrial respirator, the combination comprising s. face piece having gripping means thereon, a removable illter box with spaced apart walls having receiving means on one of said walls connected to said gripping means, said gripping means including a link removably connected to a projection on a wall of said box, and a locking member carrying a.

head strap, mounted on said projection and holding said box in fixed immovable position to said face piece when said head strap is secured in position for use of said respirator.

4. In an industrial respirator having a demountable filter box held to a face piece by securing means, the improvement comprising a link having a hooking member, said link being connected to said securing means, said hook engaging a projection on a wall oi said box, and locking means, carrying a head strap, mounted on said projection, said locking means holding said hooking member against said projection and securing said box in iixed immovable position during use of the respirator when the head strap is in position.

Z. WHIPPLE.

CERTIFICATE or comemos.

Patent lio. 2, 582 592.

August 1h, 191e WILLIS Z WHIPPIE It 4is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page' 2, first column, line 20, for "meuber 19" read --member 27";

11ne52, after "accomplished" 'insert --lmnediatelyline 2l, for "stud 27" arri second column, line lh, claim l, after "'face" insert -pi.ece'; and that the said Letters Patent should be read with this `correction therein that the same may conform to the record of the case in the Patent Office.

signed and sensa this ist day or January, A. D. 19ii6.

(Seal) Leslie Frazer First Assistant Gcsmnissioner of Patents.

convenient position for use. During this securing operation the extension arm 23 terminating in the hook 24 becomes secured in position around the stud 2l. the stud coming to rest against a shoulder 25 of a slot 2B in the hook 24.

Also mounted upon the stud 2i is a T-slotted member 21. One slot of the T has secured therein a head or neck strap 28. The other slot of the T rides in the annular groove 22 oi the stud 2| and the entire T-slotted member overlies the hook 2l on the extension 23. Projecting from one leg of the T-slotted member is a. U- shaped hook 28 which constitutes an important portion of the locking means.

As the iilter box is swung into iitted position so that the stud 2| enters the slot 2B of the hook, a portion ll of the hook 24 enters Ithe U-shaped hook 29. The filter pad is now located in its intended position and when the head strap is swung into position, the T-slotted member I8 pivots around the stud 21 with the U-shaped hooked member 2S swinging around the portion 3U of the edge of the hook member 2l, locking the connected parts securely together and holding the lter box in xed and immovable position during the time the respirator is in use (Fig. 3).

It is very desirable that the lter boxes be quickly removable so that they can be cleaned and sterilized from time to time during the period oi' a working day if necessary. This is readily accomplished when the head or neck strap is removed by the wearer, because in doing so, the locking members automatically disengage themselves and the lter box can readily be removed from its seated position against the facel piece.

lt will thus be seen that the objects hereinbefore set forth can readily and efficiently be attained and since certain changes may be made in the above article and diii'erent embodiments of the invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended to cover all of the generic and specinc features of the invention herein described, and all statements of the scope of the invention which. as a matter or language. might be said to fall therebetween.

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In an industrial respirator. the combination comprising a face piece with gripping means thereon, a removable fllter box with spaced apart walls having receiving means on one of said walls connected to said gripping means, said gripping means including a link removably connected to a projection on a wall of said box, and a locking member securing said link to said projection and holding said box in iixed immovable position on said face during use of said respirator.

2. In an industrial respirator, the combination comprising a face piece having gripping means thereon, a. removable iilter box having receiving means on one of said walls connected to said gripping means. said gripping means including a link removably connected to a projection on a wallof said box, said projection being connected with said receiving means. and a locking member securing said link to said projection and holding said box in xed immovable position on said face piece during use or said respirator.

3. In an industrial respirator, the combination comprising s. face piece having gripping means thereon, a removable illter box with spaced apart walls having receiving means on one of said walls connected to said gripping means, said gripping means including a link removably connected to a projection on a wall of said box, and a locking member carrying a.

head strap, mounted on said projection and holding said box in fixed immovable position to said face piece when said head strap is secured in position for use of said respirator.

4. In an industrial respirator having a demountable filter box held to a face piece by securing means, the improvement comprising a link having a hooking member, said link being connected to said securing means, said hook engaging a projection on a wall oi said box, and locking means, carrying a head strap, mounted on said projection, said locking means holding said hooking member against said projection and securing said box in iixed immovable position during use of the respirator when the head strap is in position.

Z. WHIPPLE.

CERTIFICATE or comemos.

Patent lio. 2, 582 592.

August 1h, 191e WILLIS Z WHIPPIE It 4is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page' 2, first column, line 20, for "meuber 19" read --member 27";

1111032 n1.1501" "accomplished" 'insert --imediatelyng and line 2l, for "stud 27" second column, line lh, claim l, after "'face" insert -pi.ece'; and that the said Letters Patent should be read with this `correction therein that the same may conform to the record of the case in the Patent Office.

signed and sensa this ist day or January, A. D. 19ii6.

(Seal) Leslie Frazer First Assistant Gcsmnissioner of Patents. 

